Wow Dan, pretty incredible find. Do you remember Marvel Superheros from 1967? Poor animation but excellent stories and voices. Buena Vista will not release them because they think the animation is too dated to attract sales.

Came acrosas some PD dollar DVD's of Cluch Cargo a few weeks back at a chaine here called Yankee Dollar but I imagine they can be had wherever fine one dollar DVD's are sold. Keep a look out, I saw up to volume 5...and they had the similar Alex Toth series, Space Angel!